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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa4c22a39f745b5acbbc47d0426b0b7887c7faa2e8e0ab41a75aca80c1970456' 
  AND token = 'w/io8znsOx+2J2msm+SQvMkzd0FS4M3dWHJRXecXAJs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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