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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c7cce6fa0e1dd4e2cba0ac1216ae94324a33945548ade4db493a9637a4aaabd7' 
  AND token = 'J6XJetIkslGKwNdL3W/jdcwuicDzNpSKeHMpZuxDia0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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