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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0609b80b489f676cfd7b8b8768c2853dd530c781b70bea8e0bbbeab8d2c2233' 
  AND token = 'iMm/yl0+FofdCNSeNd/g0nqiuDMl7AynjiiuTJ50ESY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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