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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '066299c26e2aebd304b0191ae3a28179c3acdf51215943c2d8b8948863612993' 
  AND token = 'Et1L6yOtrVypWjNb8o+JgcyEdjkCmTHcOxoh+1JYDog=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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