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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6398ae0096f4476357e70bd965959b679af812d4e024d48676222c8554115241' 
  AND token = 'wmE7NbPpVQCeNEW7OoQ/98oB3iBW8Otw8ff4IQ2Hf3g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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