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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01762d8cd497fa83255b8e634adaeac08b6b2bcd117289266fa3e8afa8489885' 
  AND token = 'qk2Fb5M9mx5a3RNE5jz/iJtRq01QP/jKUZE+EXagD9o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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