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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '29e95ccbb37f406d62110cc4562d4fc2a4c003c774a79ca157c2979fc9654c3c' 
  AND token = 'qB7HtcfPiI0+1WQMQKP2I9MJawlLy3EQTf5rotDNDJ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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