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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e438cbd3abf573c97b727d88e46ca6ab00b697d06dbbd52e544e2ad891492c63' 
  AND token = 'bA40vT96DqQ6HRKUiySOK79gBL+61X2rPD1VGchs19o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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