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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e63f6542b415fdbd9d569d4c0cda48df376660d940093023c4c1f6d12e5a22a0' 
  AND token = 'ievBR0VFAatPYUVvAps4ZmZ/rkh/dSV3t3oRDrL7wHI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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