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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c626dcf8a3899e56e32df61edd6c0390248f5f251e8dccb9c27a5f62b6a0995' 
  AND token = 'wI6754G1++r837U152QhR1yEIMeaz5qL/2clJpAFbe0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}