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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e823f95a136cf837fd1644d39f8dc9b5bca231a77b4ecfa149c093c9fdbf2be8' 
  AND token = '3OUDvmck3qc6LJ2sJUYL3XEpOd68kcsOZPcvLD7SyJ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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