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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96d30e2c26920acfeef7bd69947e7a871dadc01c6387ba10dbdf170114d21786' 
  AND token = 'EadlYE4Mb2ldWdGLGT1332hlWLDyBDsg9Cs7s2V+uCE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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