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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7dfdf6ed564bca1f96a9ab1b7a2a5f4cc83e44779287a4df0f90c07ae9dc86e' 
  AND token = 'T0I0I5SU+oG69dqkZqGahZg+R13rEFewe0pNQgAk54I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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